/* ============================================
   AM4 BRASIL - CONTABILIDADE & CONSULTORIA
   Identidade Visual Editorial Refinada
   ============================================ */

:root {
  /* Paleta de Cores Exclusiva */
  --primary-navy: #1a4d7a;
  --primary-green: #2d7a4f;
  --accent-gold: #b8925a;
  --neutral-charcoal: #2a2a2a;
  --neutral-slate: #5a5a5a;
  --neutral-silver: #8a8a8a;
  --background-pearl: #f8fafb;
  --background-mist: #e8f1f5;
  --background-cream: #f5f3f0;
  --border-subtle: #d4d4d4;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --shadow-soft: rgba(26, 77, 122, 0.08);
  --shadow-medium: rgba(26, 77, 122, 0.15);
  
  /* Tipografia Editorial */
  --font-display: Georgia, 'Times New Roman', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-technical: 'SF Mono', 'Monaco', 'Courier New', monospace;
  
  /* Espaçamento Preciso */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-xxl: 6rem;
  
  /* Transições Suaves */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-elegant: 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ============================================
   RESET E FUNDAÇÕES
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--background-pearl);
  overflow-x: hidden;
}

/* ============================================
   TIPOGRAFIA EDITORIAL
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--primary-navy);
  margin-bottom: var(--space-md);
  letter-spacing: -0.015em;
}

h1 {
  font-size: 3.25rem;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: 2.5rem;
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: 1.875rem;
}

h4 {
  font-size: 1.5rem;
  font-weight: 500;
}

h5 {
  font-size: 1.25rem;
  font-weight: 500;
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

strong {
  font-weight: 600;
  color: var(--text-primary);
}

em {
  font-style: italic;
  color: var(--primary-green);
}

/* ============================================
   HEADER NAVEGAÇÃO
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(248, 250, 251, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  transition: var(--transition-smooth);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px var(--shadow-soft);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo img {
  height: 48px;
  width: auto;
  transition: var(--transition-fast);
}

.site-logo:hover img {
  opacity: 0.85;
}

.main-nav {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--neutral-charcoal);
  text-decoration: none;
  position: relative;
  padding: var(--space-xs) 0;
  transition: var(--transition-fast);
  letter-spacing: 0.01em;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-green);
  transition: var(--transition-smooth);
}

.nav-link:hover {
  color: var(--primary-navy);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--primary-navy);
}

.nav-link.active::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.mobile-menu-toggle span {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--primary-navy);
  margin: 5px 0;
  transition: var(--transition-fast);
  border-radius: 2px;
}

/* ============================================
   SEÇÕES E LAYOUT
   ============================================ */

.section {
  padding: var(--space-xxl) var(--space-lg);
  position: relative;
}

.section-content {
  max-width: 1200px;
  margin: 0 auto;
}

.section-wide {
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary-green);
  margin-bottom: var(--space-sm);
  display: block;
}

.section-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto var(--space-lg);
  line-height: 1.8;
}

/* Alternância de backgrounds */
.section:nth-child(even) {
  background-color: var(--background-pearl);
}

.section:nth-child(odd) {
  background-color: #ffffff;
}

.section.featured {
  background: linear-gradient(135deg, var(--background-mist) 0%, var(--background-pearl) 100%);
  position: relative;
}

.section.featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../assets/pattern.svg');
  background-repeat: repeat;
  background-size: 200px 200px;
  opacity: 0.4;
  pointer-events: none;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
  min-height: 85vh;
  display: flex;
  align-items: center;
  background-image: url('../assets/hero.svg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  padding-top: calc(var(--space-xxl) + 60px);
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  z-index: 2;
}

.hero-eyebrow {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary-green);
  margin-bottom: var(--space-md);
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: rgba(45, 122, 79, 0.1);
  border-radius: 4px;
  animation: fadeInUp 0.6s ease;
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--primary-navy);
  margin-bottom: var(--space-lg);
  max-width: 900px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-subtitle {
  font-size: 1.5rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 700px;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  animation: fadeInUp 0.6s ease 0.6s both;
}

.stat-item {
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.7);
  border-radius: 8px;
  border-left: 4px solid var(--primary-green);
  backdrop-filter: blur(8px);
  transition: var(--transition-smooth);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow-soft);
  border-left-color: var(--primary-navy);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-navy);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================
   CARDS E COMPONENTES
   ============================================ */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.card {
  background: #ffffff;
  border-radius: 12px;
  padding: var(--space-lg);
  border: 1px solid var(--border-subtle);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-navy), var(--primary-green));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-smooth);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px var(--shadow-medium);
  border-color: var(--primary-green);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-navy), var(--primary-green));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 1.5rem;
  color: white;
  font-weight: 700;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--primary-navy);
}

.card-description {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   TABELAS INFORMATIVAS
   ============================================ */

.info-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--space-lg) 0;
  background: #ffffff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow-soft);
}

.info-table thead {
  background: linear-gradient(135deg, var(--primary-navy), var(--primary-green));
  color: white;
}

.info-table th {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.info-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.info-table tbody tr:last-child td {
  border-bottom: none;
}

.info-table tbody tr {
  transition: var(--transition-fast);
}

.info-table tbody tr:hover {
  background-color: var(--background-mist);
}

/* ============================================
   FAQ INTERATIVO
   ============================================ */

.faq-container {
  max-width: 900px;
  margin: var(--space-xl) auto;
}

.faq-item {
  background: #ffffff;
  border-radius: 8px;
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.faq-item:hover {
  border-color: var(--primary-green);
}

.faq-question {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--primary-navy);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-fast);
}

.faq-question:hover {
  color: var(--primary-green);
}

.faq-icon {
  font-size: 1.5rem;
  color: var(--primary-green);
  transition: var(--transition-smooth);
  font-weight: 300;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 var(--space-lg);
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 var(--space-lg) var(--space-lg);
}

.faq-answer p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================
   FORMULÁRIO DE CONTATO
   ============================================ */

.contact-form {
  max-width: 700px;
  margin: var(--space-xl) auto;
  background: #ffffff;
  padding: var(--space-xl);
  border-radius: 12px;
  box-shadow: 0 8px 32px var(--shadow-soft);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--neutral-charcoal);
  margin-bottom: var(--space-xs);
  letter-spacing: 0.01em;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--background-pearl);
  border: 2px solid var(--border-subtle);
  border-radius: 8px;
  transition: var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-green);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(45, 122, 79, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-button {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  font-weight: 600;
  color: #ffffff;
  background: linear-gradient(135deg, var(--primary-navy), var(--primary-green));
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--shadow-medium);
}

.form-button:active {
  transform: translateY(0);
}

.form-message {
  padding: var(--space-md);
  border-radius: 8px;
  margin-top: var(--space-md);
  font-weight: 500;
  display: none;
}

.form-message.success {
  background: rgba(45, 122, 79, 0.1);
  color: var(--primary-green);
  border: 1px solid var(--primary-green);
  display: block;
}

.form-message.error {
  background: rgba(185, 28, 28, 0.1);
  color: #b91c1c;
  border: 1px solid #b91c1c;
  display: block;
}

/* ============================================
   RODAPÉ
   ============================================ */

.site-footer {
  background: var(--neutral-charcoal);
  color: #ffffff;
  padding: var(--space-xl) var(--space-lg) var(--space-md);
  border-top: 4px solid var(--primary-green);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-section h4 {
  color: #ffffff;
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
  font-family: var(--font-body);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9375rem;
  line-height: 1.6;
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-section a:hover {
  color: var(--primary-green);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
}

.footer-legal {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.5;
  margin-bottom: var(--space-xs);
}

.footer-credentials {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.4;
  letter-spacing: 0.02em;
}

/* ============================================
   ANIMAÇÕES
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVIDADE
   ============================================ */

@media (max-width: 1024px) {
  html {
    font-size: 15px;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .section {
    padding: var(--space-xl) var(--space-md);
  }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(248, 250, 251, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    box-shadow: 0 8px 32px var(--shadow-soft);
    transform: translateY(-120%);
    transition: var(--transition-smooth);
  }
  
  .main-nav.active {
    transform: translateY(0);
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.25rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .section {
    padding: var(--space-lg) var(--space-sm);
  }
  
  .info-table {
    font-size: 0.875rem;
  }
  
  .info-table th,
  .info-table td {
    padding: var(--space-sm) var(--space-md);
  }
}

/* ============================================
   UTILITÁRIOS
   ============================================ */

.text-center {
  text-align: center;
}

.text-green {
  color: var(--primary-green);
}

.text-navy {
  color: var(--primary-navy);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.highlight-box {
  background: var(--background-cream);
  border-left: 4px solid var(--accent-gold);
  padding: var(--space-lg);
  border-radius: 8px;
  margin: var(--space-lg) 0;
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
  margin: var(--space-xl) 0;
}